Also known as:
Zenker’s diverticulum, Pulsion diverticulum, Traction diverticulum
An esophageal diverticulum is a pouch of mucous membrane that sticks out through the esophageal lining, in the case of repeated, hard swallowing against a blockage (pulsion diverticulum). Blockage can be caused by a motility disorder or stricture. A Zenker’s diverticulum results from the upper esophageal sphincter’s failure to relax. Less commonly, scarring next to the esophagus pulls the esophageal wall in the direction of the scarring (traction diverticulum), usually resulting from scarring of a healed, previously infected chest lymph node.